The Install Piked OS X El Capitan app is used to build a modified installation set from the Apple-supplied Install OS X El Capitan app. The modifications include:
- Replacing the boot.efi file with the version created by Pike R. Alpha
- Removing SIP control on the boot.efi files so that those files can be protected from the Apple Update process
Versions 1.9 and higher will detect the presence of an existing modified installation set, and offer to re-use it. This option will simply re-bless the location correctly to make the volume bootable again.
Otherwise, the original installation data is unpacked, modified, and repacked. The location of the data is then blessed so that the MacPro can boot from this data directly into the installer.
A reboot is therefore required.